WO2011129820A1 - Process for producing phosphinothricin employing nitrilases - Google Patents
Process for producing phosphinothricin employing nitrilases Download PDFInfo
- Publication number
- WO2011129820A1 WO2011129820A1 PCT/US2010/031007 US2010031007W WO2011129820A1 WO 2011129820 A1 WO2011129820 A1 WO 2011129820A1 US 2010031007 W US2010031007 W US 2010031007W WO 2011129820 A1 WO2011129820 A1 WO 2011129820A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- set forth
- formula
- substituted
- enzyme
- nitrile
- Prior art date
Links
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- 230000008569 process Effects 0.000 title claims abstract description 134
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- 239000003795 chemical substances by application Substances 0.000 description 1
- WIIZWVCIJKGZOK-RKDXNWHRSA-N chloramphenicol Chemical compound ClC(Cl)C(=O)N[C@H](CO)[C@H](O)C1=CC=C([N+]([O-])=O)C=C1 WIIZWVCIJKGZOK-RKDXNWHRSA-N 0.000 description 1
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- FCDHSFUOYFXWHV-UHFFFAOYSA-N cyanosulfinylformonitrile Chemical compound N#CS(=O)C#N FCDHSFUOYFXWHV-UHFFFAOYSA-N 0.000 description 1
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- IRXSLJNXXZKURP-UHFFFAOYSA-N fluorenylmethyloxycarbonyl chloride Chemical compound C1=CC=C2C(COC(=O)Cl)C3=CC=CC=C3C2=C1 IRXSLJNXXZKURP-UHFFFAOYSA-N 0.000 description 1
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- 125000005843 halogen group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011785 micronutrient Substances 0.000 description 1
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- 238000002156 mixing Methods 0.000 description 1
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- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 125000002560 nitrile group Chemical group 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000000243 photosynthetic effect Effects 0.000 description 1
- 239000013600 plasmid vector Substances 0.000 description 1
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- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 150000003141 primary amines Chemical group 0.000 description 1
- 238000011027 product recovery Methods 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 238000012552 review Methods 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
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- 125000001424 substituent group Chemical group 0.000 description 1
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- 229960002180 tetracycline Drugs 0.000 description 1
- 229930101283 tetracycline Natural products 0.000 description 1
- 235000019364 tetracycline Nutrition 0.000 description 1
- 150000003522 tetracyclines Chemical class 0.000 description 1
- WROMPOXWARCANT-UHFFFAOYSA-N tfa trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F.OC(=O)C(F)(F)F WROMPOXWARCANT-UHFFFAOYSA-N 0.000 description 1
- 150000007970 thio esters Chemical class 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 229940086542 triethylamine Drugs 0.000 description 1
- 108700026220 vif Genes Proteins 0.000 description 1
- 125000002348 vinylic group Chemical group 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/30—Phosphinic acids [R2P(=O)(OH)]; Thiophosphinic acids ; [R2P(=X1)(X2H) (X1, X2 are each independently O, S or Se)]
- C07F9/32—Esters thereof
- C07F9/3205—Esters thereof the acid moiety containing a substituent or a structure which is considered as characteristic
- C07F9/3211—Esters of acyclic saturated acids which can have further substituents on alkyl
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/30—Phosphinic acids [R2P(=O)(OH)]; Thiophosphinic acids ; [R2P(=X1)(X2H) (X1, X2 are each independently O, S or Se)]
- C07F9/301—Acyclic saturated acids which can have further substituents on alkyl
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/30—Phosphinic acids [R2P(=O)(OH)]; Thiophosphinic acids ; [R2P(=X1)(X2H) (X1, X2 are each independently O, S or Se)]
- C07F9/36—Amides thereof
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/14—Hydrolases (3)
- C12N9/78—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/001—Amines; Imines
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/002—Nitriles (-CN)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/02—Amides, e.g. chloramphenicol or polyamides; Imides or polyimides; Urethanes, i.e. compounds comprising N-C=O structural element or polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/04—Alpha- or beta- amino acids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P17/00—Preparation of heterocyclic carbon compounds with only O, N, S, Se or Te as ring hetero atoms
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y305/00—Hydrolases acting on carbon-nitrogen bonds, other than peptide bonds (3.5)
- C12Y305/05—Hydrolases acting on carbon-nitrogen bonds, other than peptide bonds (3.5) in nitriles (3.5.5)
- C12Y305/05001—Nitrilase (3.5.5.1)
Definitions
- the present invention generally relates to processes for the enzymatic production of a phosphinothricin product or precursor thereof from a nitrile-containing substrate.
- L-phosphinothricin (commonly referred to as glufosinate) and its salts and esters are known to be useful as a broad spectrum, non-selective herbicide.
- the ammonium salt of phosphinothricin is the most common commercially available form.
- the herbicidal efficacy of L-phosphinothricin or salts and esters thereof is generally about twice that of other
- phosphinothricin are known in the art. For example, some routes utilize phosphorus trichloride to produce a phosphinate
- one process for producing phosphinothricin generally comprises converting phosphorus trichloride to methylphosphonous dichloride or a derivative thereof.
- the methylphosphonous dichloride or derivative thereof is then reacted with methanol to form methyl methylphosphinate.
- Methyl methylphosphinate is then reacted with vinylic compounds (e.g., vinyl acetate) to form an intermediate (e.g., 2- (methoxy (methyl) phosphoryl) ethyl acetate) .
- the resulting intermediate is pyrolyzed to prepare a vinylphosphinate
- the vinylphosphinate precursor is subjected to hydroformylation-aminocarbonylation, followed by hydrolysis of the hydroformylation-aminocarbonylation product in the presence of hydrochloric acid to produce phosphinothricin .
- Another process of producing phosphinothricin generally comprises converting phosphorus trichloride to an adduct of methylphosphonous trichloride and aluminum
- tetrachloride i.e., CH 3 PC1 3 » A1C1 4
- the adduct is reacted with ethylene to form an intermediate adduct, which is then reacted with ethanol to form ethyl 1- (2-chloroethyl) -methylphosphinate .
- This compound is reacted with potassium hydroxide and ethanol to prepare an ethyl vinylphosphinate precursor.
- vinylphosphinate precursor is subjected to hydroformylation- aminocarbonylation, followed by hydrolysis of the
- hydroformylation-aminocarbonylation product in the presence of hydrochloric acid to produce phosphinothricin.
- phosphinothricin are known in the art, there exists a need for a process that represents an improvement in process economics by virtue of requiring fewer process steps and fewer reagents than conventional processes. There also exists a need for an economical stereoselective process that preferentially produces L-phosphinothricin products or precursors thereof.
- the present invention is directed to processes for the enzymatic production of a
- phosphinothricin product or precursor thereof from a nitrile- containing substrate phosphinothricin product or precursor thereof from a nitrile- containing substrate.
- the present invention is directed to processes for the production of a phosphinothricin product or precursor thereof comprising contacting in a reaction mixture a nitrile-containing substrate with an enzyme capable of
- the present invention is directed to processes believed to be stereoselective for the production of L-phosphinothricin products or precursors thereof.
- the present invention is directed to processes for the preparation of a phosphinothricin product or precursor thereof.
- the process comprises contacting in a reaction mixture a nitrile-containing substrate of Formula I
- Formula I with an enzyme capable of catalyzing the hydrolysis of -CN to - COX , wherein X is either -OH or -NH? ; and wherein
- R 1 is hydrogen, -C (0 ) R 4 , or substituted or unsubstituted Ci ⁇ C 8 alkyl;
- R 2 is hydrogen, -C (0 ) R 4 , -C ( 0 ) R 5 , or substituted or
- Ci-C s alkyl unsubstituted Ci-C s alkyl; or R 1 and R 2 are part of a heterocyclic ring;
- R 3 is hydrogen, substituted or unsubstituted Ci -C 8 alkyl, substituted or unsubstituted aryl, or an agronomically
- R 4 and R 5 are independently hydrogen, substituted or unsubstituted Ci-C s alkyl, substituted or unsubstituted Ci-Cs alkoxy, substituted or unsubstituted aryl, or substituted or unsubstituted furanyl .
- the process comprises:
- R is hydrogen, substituted or unsubstituted Ci-Cs alkyl, substituted or unsubstituted aryl, or an agronomically
- Yet another aspect of the present invention is directed to processes for the preparation of N-formyl
- the process comprises:
- R 3 is hydrogen, substituted or unsubstituted ( Ci -Cs ) alkyl, substituted or unsubstituted aryl, or an agronomically acceptable salt-forming cation;
- R is hydrogen, substituted or unsubstituted Ci -Cs alkyl, substituted or unsubstituted aryl, or an agronomically
- X is either -OH or -NH 2 and R is hydrogen, substituted or unsubstituted ( Ci-C 8 ) alkyl, substituted or unsubstituted aryl, or an agronomically acceptable salt-forming cation.
- Another aspect of the present invention is directed to novel enzymes capable of catalyzing the hydrolysis of -CN to -COX, wherein X is -OH or -NH 2 and novel gene sequences that encode a nitrilase, which are useful in the enzymatic production of a phosphinothricin product or precursor thereof.
- Fig. 1 is plasmid map pJexpress401 : 31491.
- Fig. 2 shows high performance liquid chromatography (HPLC) results for the conversion of N-formyl nitrile phosphinic ester to N-formyl acid phosphinic ester determined as described in Example 3.
- SEQ ID NO: 1 is a nucleotide sequence encodinq a R. rhodochrous nitrilase.
- SEQ ID NO: 2 is a nucleotide sequence encodinq an A. faecalis nitrilase.
- SEQ ID NO: 3 is a nucleotide sequence encodinq an A. thaliana nitrilase.
- SEQ ID NO: 4 is a nucleotide sequence encodinq a B. campestris nitrilase.
- SEQ ID NO: 5 is a nucleotide sequence encodinq a B. campestris nitrilase.
- SEQ ID NO: 6 is a nucleotide sequence encodinq a P. fluorescens nitrilase.
- SEQ ID NO: 7 is a nucleotide sequence for a plasmid pSEA99.
- SEQ ID NO: 8 is a nucleotide sequence for a plasmid pSEAlOO .
- Described herein are processes for the enzymatic production of a phosphinothricin product or a precursor thereof (e.g., a compound of Formula VI described elsewhere herein) .
- Processes of the present invention generally comprise contacting a nitrile-containing substrate (e.g., a compound of Formula I detailed elsewhere herein) with an enzyme capable of catalyzing the hydrolysis of a nitrile group (e.g., a nitrilase or a nitrile hydratase) .
- an enzyme capable of catalyzing the hydrolysis of a nitrile group e.g., a nitrilase or a nitrile hydratase
- processes for the preparation of N-formyl substrates suitable for use in the preparation of a phosphinothricin product or precursor thereof.
- the enzymatic processes of the present invention require reduced processing and/or reduced raw materials as compared to conventional processes.
- L-phosphinothricin products are known to exhibit greater herbicidal efficacy than other phosphinothricin stereoisomers. Thus, processes of the present invention are believed to provide greater yields of herbicidally active compounds over
- novel compounds useful as intermediates in the preparation of a phosphinothricin product or precursor thereof are also described herein.
- novel phosphinothricin precursors useful for the preparation of a phosphinothricin product e.g. the acid of phosphinothricin
- the present invention is directed to processes for preparing a phosphinothricin product or precursor thereof that comprise contacting in a reaction mixture a nitrile-containing substrate with an enzyme capable of catalyzing the hydrolysis of -CN to -COX , wherein X is -OH or -NH 2 .
- Suitable nitrile-containing substrates include substrates of Formula I :
- R 1 is hydrogen, -C (0 ) R 4 , or substituted or unsubstituted Ci-C s alkyl;
- R 2 is hydrogen, - C ( 0 ) R 4 , -C ( 0 ) R 5 , or substituted or unsubstituted Ci-C s alkyl; or R 1 and R 2 are part of a heterocyclic ring;
- R 3 is hydrogen, substituted or unsubstituted Ci-C s alkyl, substituted or unsubstituted aryl, or an agronomically acceptable salt-forming cation;
- R 4 and R 5 are independently hydrogen, substituted or unsubstituted Ci-C 8 alkyl, substituted or unsubstituted Ci-C 8 alkoxy, substituted or unsubstituted aryl, or substituted or unsubstituted furanyl .
- an "agronomically acceptable salt- forming cation" is defined as a salt-forming cation that allows agriculturally and economically useful herbicidal activity of a phosphinothricin anion.
- a cation may be, for example, an alkaline or alkaline earth metal cation (e.g., a sodium or potassium ion) , an ammonium ion, an alkylammonium ion, a
- the salt -forming cation is an ammonium cation .
- R 1 and R 2 are each hydrogen.
- R 1 , R 2 , R 4 and R 5 are independently hydrogen or substituted or unsubstituted Ci-Cs alkyl and R 3 is hydrogen or substituted or unsubstituted Ci-C 8 alkyl.
- R 2 is -C(0)R 4 and R 4 is hydrogen. In other embodiments, R 2 is -C(0)R 4 and R 4 is
- Ci-Cs alkoxy substituted or unsubstituted Ci-Cs alkoxy and more preferably Ci or C 2 alkoxy.
- R 3 is substituted or unsubstituted Ci-Cs alkyl, substituted or unsubstituted aryl, or an agronomically acceptable salt-forming cation.
- R 3 is Ci-Cs alkyl and more preferably methyl or ethyl.
- R 3 is hydrogen.
- R 3 is a salt-forming ammonium cation.
- R 1 and R 2 are each hydrogen and R 3 is ethyl. In other preferred embodiments,
- R 1 is hydrogen
- R 2 is -C(0)R 4
- R 3 is ethyl
- R 4 is hydrogen
- R 2 is -C(0)R 4 and R 1 , R 3 , and R 4 are each hydrogen.
- R 1 and R 2 may be part of a heterocyclic ring.
- R 4 and R 5 may be bonded to form a heterocyclic ring.
- R 1 and R 2 when R 1 and R 2 are each -C(0)R 4 , R 1 and R 2 may be bonded to form a cyclic imide .
- the nitrile-containing substrate as described above may be produced according to various processes. For example, in one process, acrolein is reacted with a phosphinate compound of Formula II,
- R in Formula II and Formula III is defined as described above for Formula I .
- R 3 in Formula III and Formula IV is defined as described above for Formula I .
- the nitrile-containing substrate of Formula IV produced by the Strecker synthesis can then be enzymatically hydrolyzed according to the process of the present invention by contacting in a reaction mixture (e.g., an aqueous medium) the nitrile-containing substrate (Formula IV) with an enzyme capable of catalyzing the hydrolysis of -CN to -COX, wherein X is -OH or -NH 2 .
- a reaction mixture e.g., an aqueous medium
- the enzymatic hydrolysis of the nitrile-containing substrate forms a phosphinothricin product.
- the nitrile- containing substrate produced from the above Strecker synthesis may be subjected to further reaction (e.g., alkylation or formylation) wherein, for example, at least one hydrogen of the primary amine group may be substituted.
- the substrate of Formula IV is further reacted with one or more formylation reagents to form an N- formyl substrate according to the following reaction:
- R in Formula IV and Formula V is defined as described above for Formula I .
- the one or more formylation reagents are selected from the group consisting of formic acid, acetic anhydride, ethyl formate, N-formyl benzotriazole, dichloromethane, and combinations thereof.
- the one or more formylation reagents are selected from the group consisting of formic acid, acetic anhydride, ethyl formate, N-formyl benzotriazole, dichloromethane, and combinations thereof.
- the one or more formylation reagents include formic acid and acetic anhydride. In various other embodiments, the one or more formylation reagents include ethyl formate. In still further embodiments, the one or more formylation reagents include N-formyl benzotriazole and dichloromethane.
- the formylation reaction temperature is from about 0°C to about 100°C, preferably from about 0°C to about 50°C, and more preferably from about 0°C to about 20°C.
- nitrile-containing substrates of Formula I may be contacted in a reaction mixture with an enzyme capable of catalyzing the hydrolysis of -CN to -COX, wherein X is -OH or -NH 2 , thereby forming a phosphinothricin product or precursor thereof having the structure of Formu
- X is -OH. In various other embodiments, X is -NH 2 .
- the reaction mixture comprises an aqueous medium.
- the reaction mixture comprises an organic solvent.
- Suitable organic solvents include, for example, various aqueous miscible solvents known in the art, such as acetone, methyl-ethyl ketone, alcohols (e.g., methanol, ethanol, butanol, etc.), acetonitrile, methylene chloride, dioxane, tetrahydrofuran, dimethyl formamide, dimethyl
- Aqueous/organic mixtures may contain as low as about 1% v/v water or up to about 95% v/v water (e.g., between about 5% v/v to about 90% v/v water) .
- the reaction mixture may comprise an aqueous immiscible solvent that provides a biphasic reaction mixture.
- aqueous immiscible solvents include, for example, various ethers (e.g., diethyl, di- isopropyl, methyl-tert-butyl, etc.), esters (e.g., ethyl acetate, butyl acetate, propyl acetate, etc.), and substituted benzenes (e.g., toluene, ethylbenzene, xylene, etc.) .
- various ethers e.g., diethyl, di- isopropyl, methyl-tert-butyl, etc.
- esters e.g., ethyl acetate, butyl acetate, propyl acetate, etc.
- substituted benzenes e.g., toluene, ethylbenzen
- R 1 or R 2 are each hydrogen and X is -OH
- the compound of Formula VI is a phosphinothricin product (i.e., the acid or a salt or ester thereof)
- a salt of Formula VI is formed when either R 3 or the -OH group (when X is -OH) is replaced with an agronomically acceptable salt-forming cation.
- a di-salt of Formula VI may be formed when R 3 and the -OH group (when X is -OH) are replaced with an agronomically acceptable salt-forming cation.
- An ester of Formula VI is formed when either R 3 or the -OH group (when X is -OH) is replaced with a substituted or unsubstituted Ci-C 8 alkyl or a substituted or unsubstituted aryl.
- a di- ester of Formula VI may be formed when R 3 and the -OH group (when X is -OH) are replaced with a substituted or unsubstituted Ci-C 8 alkyl or a substituted or unsubstituted aryl.
- the phosphinothricin product or precursor thereof of Formula VI may be further hydrolyzed when at least one R 1 , R 2 , or R J are not hydrogen.
- the compound of Formula VI when X is -NH 2 , the compound of Formula VI may be further hydrolyzed to convert the -NH 2 to -OH.
- Hydrolysis of -NH 2 may be conducted according to conventional methods known in the art. Hydrolysis may also be accomplished by enzymatic means. For example, an enzyme comprising an amidase may be used to catalyze the hydrolysis of -NH 2 to -OH in accordance with the present invention.
- a phosphinothricin product or precursor thereof may be prepared from the above- described N-formyl substrate (Formula V) in accordance with the present invention by contacting in a reaction mixture the N- formyl substrate with an enzyme capable of catalyzing the hydrolysis of -CN to -COX, wherein X is either -OH or -NH 2 , thereby forming a compound of Formula VII or a salt or ester thereof
- the reactions described above may be conducted in either a batch, semi-batch or continuous reactor system.
- the reactor system may include one or more stirred tank reactors, fluidized bed reactors, or plug flow reactors.
- the reactors may be configured in series or in parallel.
- the enzymatic hydrolysis of the nitrile-containing substrate is conducted in one or more stirred tank reactors.
- the enzymatic hydrolysis is conducted at a temperature of at least about 10°C or at least about 20°C. Typically, the enzymatic hydrolysis is conducted at a
- temperature from about 10°C to about 100 °C, more typically from about 20°C to about 80°C, from about 20°C to about 60°C, or from about 20°C to about 40°C (e.g., about 30°C) .
- the enzymatic hydrolysis is conducted at a pressure of at least about 100 kiloPascals (kPa) .
- the enzymatic hydrolysis is typically conducted at a pressure from about 100 kPa to about 1000 kPa, more preferably from about 100 kPa to about 500 kPa, and still more preferably from about 100 kPa to about 200 kPa (e.g., from about 100 kPa to about 150 kPa) .
- the pH of the reaction mixture is at least about 2. In various embodiments, the pH of reaction mixture is from about 2 to about 10 and preferably from about 4 to about 8.
- various embodiments of the present invention are directed to enzymatic hydrolysis processes for the preparation of phosphinothricin products or precursors thereof that are believed to be
- D-stereoisomers of Formula I which results in the preferential preparation of the L-stereoisomers of the phosphinothricin products or precursors thereof.
- the presence of the enzyme may reduce the free energy of reaction of the L- stereoisomer of Formula I such that its hydrolysis to the resulting carboxylic acid or amine proceeds at a greater rate than the competing hydrolysis of the D-stereoisomer .
- the enzyme may preferentially react with the L-stereoisomer of Formula I such that hydrolysis of the preferred L-stereoisomer of Formula I proceeds at a greater rate than hydrolysis of D-stereoisomer
- reaction conditions and/or components of the reaction mixture may promote dynamic kinetic resolution, resulting in the isomerization of the alpha amine group according to the following scheme: wherein R , R , and R are defined as described above for Formula I.
- Reaction conditions that may promote the above isomerization include the pH (e.g., within from about 2 to about 10) and temperature (within from about 20 °C to about 60°C) of the reaction mixture.
- the processes of the present invention may include adjusting and/or maintaining either or both of these conditions within a preferred range.
- various components may be added to the reaction mixture to promote the above isomerization.
- These compounds are believed to include one or more metals, organic compounds (e.g., aldehydes), and/or organic bases (e.g., pyridine, triethyl amine, etc . ) .
- the processes of the present invention typically provide a product mixture, or slurry comprising D- and
- the processes of the present invention result in a product mixture containing an excess of the L-phosphinothricin product or precursor thereof over D- phosphinothricin product or precursor thereof. That is, typically, the weight ratio of the L-phosphinothricin product or precursor thereof to the D-phosphinothricin product or precursor thereof is believed to be greater than about 1:1 (e.g., greater than 1:1), greater than about 2:1 or greater than about 5:1. Preferably, the weight ratio of the L-phosphinothricin product or precursor thereof to the D-phosphinothricin product or precursor thereof in the product mixture is believed to be greater than about 10:1, or even greater than about 20:1.
- the enzymatic hydrolysis processes of the present invention are also believed to provide a higher yield of the L-phosphinothricin product or precursor thereof.
- the yield of the L-phosphinothricin product or precursor thereof is believed to be greater than about 10%, greater than about 20%, greater than about 30%, greater than about 40%, or greater than about 50%.
- the yield of the L-phosphinothricin product or precursor thereof is believed to be greater than about 60% greater than about 70%, greater than about 80%, or greater than about 90%.
- the phosphinothricin product or precursor thereof may be recovered from the product mixture or slurry by one or more conventional methods known in the art including, for example, precipitation, solvent extraction, and chromatographic separation. In those processes in which precipitation is utilized, the pH is typically adjusted by addition of acid or base to precipitate the zwitterions or by addition of a salt, such as ammonia which forms the ammonium salt. Additionally or alternatively, phosphinothricin product may be recovered from the product mixture utilizing chromatographic separation methods including, for example, cation exchange chromatography in which the product mixture is contacted with a bed of cation exchange resin .
- phosphinothricin product or precursor thereof produced by the processes of the present invention may be subjected to further processing including purification,
- phosphinothricin products produced by the processes of the present invention are useful as herbicidal agents.
- Phosphinothricin products i.e., glufosinate or salts or esters thereof
- glufosinate is formulated in the form of its ammonium salt.
- Formulations of glufosinate or its salts or esters thereof may include other components such as surfactants, stabilizers, and/or co- herbicides, fungicides, or pesticides .
- hydrolysis of -CN to -COX, wherein X is either -OH or -NH 2 are suitable for use in the present invention.
- Suitable examples of such enzymes include, for example, nitrilases, nitrile
- Nitrilases are capable of catalyzing the hydrolysis of -CN to -OH.
- Nitrile hydratases are capable of catalyzing the hydrolysis of -CN to -NH 2 , which then can be subsequently hydrolyzed to -OH by either conventional hydrolysis or by enzymatic hydrolysis.
- Enzymes useful for catalyzing the hydrolysis of -NH 2 to -OH comprise amidases. Accordingly, a mixture of nitrile hydratase and amidase is capable of
- the process comprises the use of a nitrilase.
- the process comprises the use of a nitrile hydratase.
- the process comprises the use of a mixture of nitrile hydratase and amidase.
- the process comprises the use of a mixture of nitrilase and nitrile hydratase.
- the process comprises the use of a mixture of nitrilase, nitrile hydratase, and amidase.
- Suitable enzymes that are capable of catalyzing the hydrolysis of -CN to -COX, wherein X is either -OH or - H 2 may be obtained from any number of sources or by any number of methods.
- the enzymes may be obtained from a source organism, such as a eukaryote or prokaryote which naturally expresses or produces the enzyme (i.e., a source organism to which the enzyme is endogenous) .
- suitable eukaryotes include species from the genera Arabidopsis, Nicotiana, and Brassica, and include the particular species A. thaliana, N. tabacum, B.
- campestris B. napaus, Aspergillus, Trichoderma, Saccharomyces , Pichia, Candida, and Hansenula.
- suitable campestris B. napaus, Aspergillus, Trichoderma, Saccharomyces , Pichia, Candida, and Hansenula.
- prokaryotes include species from the genera of Salmonella,
- Pseudomonas Sphingomonas, Methylomonas, Methylobacter,
- Methylococcus Methylosinus , Methylomicrobium, Methylocystis, Methylobacterium, Alcaligenes, Synechocystis, Synechococcus , Anabaena, Thiobacillus, Methanobacterium, Klebsiella,
- Myxococcus, and Staphylococcus include the particular species of P. putida, P. fluorescens, R. rhodochrous, R.
- the enzyme may be obtained from a source organism that has been manipulated to produce the enzyme (i.e., a source organism to which the enzyme is exogenous) .
- the enzyme of interest may be produced in heterologous host cells, particularly microbial host cells.
- Preferred heterologous microbial host cells for expression of targeted enzymes are microbial hosts that can be found broadly within the fungal or bacterial families and which grow over a wide range of temperature, pH values, and solvent tolerances.
- any bacteria, yeast, and filamentous fungi will be suitable hosts for expression of the genes encoding the enzyme of interest.
- transcription, translation, and the protein biosynthetic apparatus are the same irrespective of the cellular feedstock, targeted genes are expressed irrespective of carbon feedstock used to generate cellular biomass.
- Large-scale microbial growth and functional gene expression may utilize a wide range of simple or complex carbohydrates, organic acids and alcohols, and saturated hydrocarbons such as methane, or carbon dioxide in the case of photosynthetic or chemoautotrophic hosts.
- the targeted genes may be regulated (up or down) , repressed or depressed by specific growth conditions, which may include the form and amount of nitrogen, phosphorous, sulfur, oxygen, carbon or any trace micronutrient including small inorganic ions.
- specific growth conditions
- the regulation of targeted genes may be achieved by the presence or absence of specific regulatory molecules that are added to the culture and are not typically considered nutrient or energy sources.
- Prokaryotic and more preferably microbial,
- genes for expression of foreign proteins are well known to those skilled in the art. Any of these could be used to construct genes for expression of the present nitrilase, nitrile hydratase, and/or amidase enzymes. These genes could then be introduced into appropriate microorganism cells via transformation to provide high-level expression of the enzymes.
- targeted genes encoding the instant targeted enzymes e.g., nitrilase, nitrile
- hydratase, and/or amidase enzymes under the control of the appropriate promoter will demonstrate increased nitrile to amide and/or carboxylic acid conversion. It is contemplated that it will be useful to express the targeted genes both in a natural host cell, as well as in a heterologous host cell. Introduction of targeted genes into native hosts will result in altered levels of existing nitrilase, nitrile hydratase and amidase activity. Additionally, targeted genes may also be introduced into non-native hosts where an existing nitrile-amide-carboxylic acid pathway may be manipulated.
- Vectors or cassettes useful for the transformation of suitable host cells are well known in the art.
- the vector or cassette contains seguences directing transcription and translation of the relevant gene, a selectable marker, and sequences allowing autonomous replication or chromosomal integration.
- Suitable vectors comprise a region 5' of the targeted gene which harbors transcriptional initiation controls and a region 3' of the DNA fragment which controls transcriptional termination. It is most preferred that both control regions are derived from genes homologous to the transformed host cell, although it is to be understood that such control regions need not be derived from the genes native to the specific species chosen as a production host.
- Initiation control regions or promoters which are useful to drive expression of the instant open reading frame (ORF) in the desired microbial host cell are numerous and familiar to those skilled in the art. Virtually any promoter capable of driving these genes is suitable for the present invention, including, but not limited, to CYC1, HIS3, GAL1, GAL10, ADH1, PGK, PH05, GAPDH, ADC1, TRP1, URA3, LEU2, ENO, TPI (useful for expression in Saccharomyces) ; AOX1 (useful for expression in Pichia) ; and lac, ara, tet, trp, IP L , IP R , T7, tac, and trc (useful for expression in Escherichia coli) as well as the amy, apr, npr promoters and various phage promoters useful for expression in Bacillus .
- the deoxy-xylulose phosphate synthase or methanol dehydrogenase operon promoter (Springer et al . , FEMS Microbiol Lett 160:119 124 (1998)), the promoter for polyhydroxyalkanoic acid synthesis (Foellner et al., Appl. Microbiol. Biotechnol. 40:284 291 (1993)), promoters identified from native plasmids in methylotrophs (EP 296484), promoters identified from methanotrophs (WO 2004/037998), and promoters associated with antibiotic resistance (e.g., kanamycin (Springer et al . , supra; Ueda et al . , Appl. Environ. Microbiol. 57:924 926 (1991)) or tetracycline (U.S. Pat. No. 4,824,786)) are suitable for expression of the present coding sequences, especially in CI metabolizers .
- the vector or expression cassette comprising the targeted gene and a promoter can also typically include a marker gene which confers a selectable phenotype on the host cell.
- the marker can encode antibiotic resistance, such as resistance to kanamycin, ampicillin, chloramphenicol, etc.
- plasmids can be maintained by auxotrophic methods resulting from the deletion of an essential gene from the host strain and complementing it by inclusion of the essential gene in plasmid containing the targeted gene.
- Specific genes may be up-regulated to increase the output of the desired nitrilase, nitrile hydratase, and amidase enzymes.
- additional copies of the targeted genes i.e., the genes encoding the desired enzymes
- the genes may be modified so as to be under the control of non-native promoters.
- regulated or inducible promoters may be used to replace the native promoter of the target gene.
- the native or endogenous promoter may be modified to increase gene expression.
- the native or endogenous promoter may be modified to increase gene expression.
- endogenous promoters can be altered in vivo by mutation
- Vectors and constructs can be introduced into the genome of a desired host, such as, for example, either yeast or microbial host, by a variety of conventional techniques. For reviews of such techniques see, for example, Weissbach &
- the enzymes useful in the present invention may be used in an isolated or purified form or in a whole cell form.
- the enzymes may be isolated from the source or host cell and used directly in an enzymatic hydrolysis by combining the enzyme with the nitrile-containing substrate, for instance, in a reaction mixture.
- the enzymes may be synthesized in a purified form by means of peptide syntheses well known in the art.
- the process comprises the use of an isolated or purified form of a nitrilase, nitrile hydratase, mixture of nitrilase and
- the process comprises the use of an isolated or purified form of a nitrilase, a nitrile hydratase, a mixture of nitrile hydratase and amidase, or mixtures thereof, and a co-factor for the activation or proper or sustained function of the enzyme.
- the isolated or purified form of the enzyme is a nucleic acid molecule encoding a nitrilase capable of catalyzing the hydrolysis of -CN to -COX wherein X is -OH or - H 2 and the molecule comprises a nucleotide sequence selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID
- the nucleic acid molecule is contained in a vector.
- the vector comprises a nucleic acid molecule selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, and SEQ ID NO: 6.
- the vector may be the plasmid pSEA99 represented by SEQ ID NO: 7 or the plasmid pSEAlOO represented by SEQ ID NO: 8.
- the nucleic acid molecules of the present invention may also be in a host cell.
- the host cell comprises a nucleic acid molecule selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, and SEQ ID NO: 6.
- the host cell comprises a vector comprising a nucleic acid molecule selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, and SEQ ID NO: 6.
- the vector may be the plasmid pSEA99 represented by SEQ ID NO: 7 or the plasmid pSEAlOO represented by SEQ ID NO: 8.
- the nucleic acid molecules of the present invention encode nitrilase proteins.
- the protein comprises a polypeptide sequence encoded by the nucleic acid molecule selected from the group consisting of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, and SEQ ID NO: 6.
- the process comprises the use of an enzyme encoded by a nucleotide sequence of SEQ ID NO: 1, SEQ ID NO: 2, SEQ ID NO: 3, SEQ ID NO: 4, SEQ ID NO: 5, or SEQ ID NO: 6.
- the enzyme is encoded by a nucleotide sequence contained in a vector, and in particular the plasmid pSEA99 represented by SEQ ID NO: 7 or the plasmid pSEAlOO represented by SEQ ID NO: 8.
- the enzymes may be utilized as part of a whole cell enzymatic hydrolysis.
- the source or host organism containing or producing the enzyme of interest is combined directly with the nitrile-containing substrate, for instance, in a reaction mixture.
- Use of a whole cell procedure is generally preferred, as this typically negates the necessity of providing any additional co-factors needed for activation of and/or proper and sustained enzyme function, those co-factors being present in or produced by the source or host cell.
- operational steps in the lysis and enzyme isolation are avoided thereby reducing the downstream processing costs.
- the process comprises the use of a whole cell procedure comprising combining or contacting the nitrile-containing substrate with a source or host cell that contains, produces, or expresses a nitrilase, nitrile hydratase, and/or amidase.
- Various enzyme formulations can be used to perform the enzymatic hydrolysis in any of the above reaction mixtures (e.g., an aqueous reaction mixture or aqueous/organic mixture). These include cell free enzyme lysates, intact microorganisms that contain native levels of the desired activity, or
- recombinant microorganisms that over express a foreign (or native) gene from a plasmid or from a genomic insertion.
- the enzymes can be used in unmodified forms as in the case of crude protein mixtures containing the desired protein, semi-purified protein formulations, or in immobilized forms.
- Protein immobilization can be done according to various published methods known to those skilled in the art including, for example, covalent attachment in various solid supports, entrapment in polymers by copolymerization with alginate, carrageenan, or other synthetic polymers, as well as cross- linking using various agents such as glutaraldehyde for the formation of cross-linked enzyme aggregates (CLEAs) (See, for example, "Immobilization of Enzymes and Cells" 2 nd Ed, Edited Jose M. Guisan, 2006 Humana Press; Brady, D. Jordan, J.
- Ci-Cs alkyl contains from 1 to 8 carbon atoms in the
- aryl denotes optionally substituted homocyclic aromatic groups, preferably monocyclic or bicyclic groups containing from 6 to 12 carbons in the ring portion, such as phenyl, biphenyl, naphthyl, substituted phenyl, substituted biphenyl or substituted naphthyl. Phenyl and substituted phenyl are the more preferred aryl.
- Alkyl and aryl groups can be substituted with at least one atom other than carbon, including moieties in which a carbon chain atom is substituted with a hetero atom such as nitrogen, oxygen, silicon, phosphorous, boron, sulfur, or a halogen atom.
- substituents include, for example, hydroxy, nitro, amino, amido, nitro, cyano, sulfoxide, thiol, thioester, thioether, ester and ether.
- heterocyclic ring denotes optionally substituted, fully saturated or unsaturated
- monocyclic or bicyclic, aromatic or nonaromatic groups having at least one heteroatom in at least one ring (i.e., nitrogen), and preferably 5 or 6 atoms in each ring (e.g., cyclic imides) .
- Plasmids were prepared by cloning synthetic genes into the commercial plasmid vector pJExpress 401 (DNA2.0) (Fig. 1) .
- the synthetic genes were designed to optimize codon usage for expression in E. coli.
- the synthetic genes were constructed and cloned into the pJexpress vector by DNA2.0.
- the cloning was performed by digesting the synthetic gene with Ndel (5') and Hind III (3') and ligating at the same sites in the pJexpress vector.
- the plasmid sequences for pSEA099 and pSEAlOO are SEQ ID NOS : 7 and 8, respectively.
- the plasmids also contain a pUC origin for replication,
- Kanamycin resistance and Lacl gene for controlling expression with isopropyl ⁇ -D-l-thiogalactopyranoside (IPTG) .
- the cell pellet was resuspended in 50 mL assay buffer (50 mM potassium phosphate pH 7.5, 1 mM of dithiothreitol (DTT) ) and cells were lysed by sonication. Cell debris was removed via centrifugation at 35,000 x g for 60 minutes. [ 0092 ] The previous clear lysate (approximately 20 mg/mL total protein, >50% nitrilase) was brought to 20% saturation with ammonium sulfate. After stirring on ice for about 2 hours, the precipitated protein was removed by centrifugation at 35,000 x g for 60 minutes.
- assay buffer 50 mM potassium phosphate pH 7.5, 1 mM of dithiothreitol (DTT)
- DTT dithiothreitol
- Ammonium sulfate was added to the remainder of the supernatant incrementally to 30% saturation while stirring on ice for 2 hours.
- the precipitated protein obtained by centrifugation at 35,000 x g for 60 minutes
- reaction mixture was prepared by mixing 800 pL of assay buffer with 100 pL of the nitrilase solution recovered as described in Example 1 (giving a total protein concentration of 2 mg/mL) and 100 yL of 20 mg/mL N-formyl nitrile solution
- Fig. 2 provides the HPLC analytical results for the reaction mixture. The results show the formation of the n- formyl acid phosphinic ester product as indicated by the peak labeled " (P) " .
- EXAMPLE 4 PREPARATION OF NITRILASE PROTEIN FOR REACTION WITH ETHYL 3-AMINO-3-CYANOPROPYL (METHYL) PHOSPHINATE
- BL21/pSEAlOO BL21/pSEAlOO .
- 2.5 mL of the culture was transferred to a 1 L baffled shake flask containing 200 mL of LB/Kan and 5 g of glucose.
- cells were harvested via centrifugation at 7,000 x g for 20 minutes.
- the cell pellet was resuspended in 10 mL assay buffer (10 mM potassium phosphate pH 7.5, 1 mM DTT) and cells were lysed by sonication. Cell debris was removed via centrifugation at 35,000 x g for 20 minutes and 3 mL of 80% glycerol was added to the clear lysate. The cell lysate was stored at 4°C for 48 hours.
- FMOC derivatives The FMOC derivatized mixture was filtered and analyzed on a Phenomenex Prodigy 5 ⁇ ODS (2) Column (250 mm x 4.6 i.d.) equilibrated in 40% water/60% (0.1% TFA in methanol) . The column ran isocratically at 1 mL/min. Both starting material and products were analyzed at 254 nm; the peak at 8.7 min was assigned as FMOC - Glufosinate and the peak at 11.9 min was assigned as FMOC-aminonitrile.
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US13/640,833 US8981142B2 (en) | 2010-04-14 | 2010-04-14 | Process of producing phosphinothricin employing nitrilases |
BR112012026205A BR112012026205A2 (en) | 2010-04-14 | 2010-04-14 | process for enzymatic production of a phosphinothricin product or a precursor thereof |
CA2796158A CA2796158C (en) | 2010-04-14 | 2010-04-14 | Process for producing phosphinothricin employing nitrilases |
PCT/US2010/031007 WO2011129820A1 (en) | 2010-04-14 | 2010-04-14 | Process for producing phosphinothricin employing nitrilases |
US14/638,766 US9683001B2 (en) | 2010-04-14 | 2015-03-04 | Process of producing phosphinothricin employing nitrilases |
US15/595,055 US10428092B2 (en) | 2010-04-14 | 2017-05-15 | Process of producing phosphinothricin employing nitrilases |
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US14/638,766 Division US9683001B2 (en) | 2010-04-14 | 2015-03-04 | Process of producing phosphinothricin employing nitrilases |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140309453A1 (en) * | 2011-09-30 | 2014-10-16 | Meiji Seika Pharma Co., Ltd. | Method for producing glufosinate p free acid |
CN105567780A (en) * | 2016-01-14 | 2016-05-11 | 重庆惠健生物科技有限公司 | Enzyme-chemocatalysis racemization removing preparation method for L-glufosinate-ammonium |
JP2017515842A (en) * | 2014-05-13 | 2017-06-15 | バイエル・クロップサイエンス・アクチェンゲゼルシャフト | Method for preparing phosphorus-containing cyanohydrins |
CN113234767A (en) * | 2021-05-13 | 2021-08-10 | 永农生物科学有限公司 | Method for producing solid L-glufosinate ammonium salt powder free of crystal water |
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CA2796158C (en) | 2010-04-14 | 2022-06-14 | Strategic Enzyme Applications, Inc. | Process for producing phosphinothricin employing nitrilases |
CN116121316A (en) * | 2016-03-02 | 2023-05-16 | 巴斯夫欧洲公司 | Process for the manufacture of L-glufosinate |
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- 2010-04-14 CA CA2796158A patent/CA2796158C/en active Active
- 2010-04-14 US US13/640,833 patent/US8981142B2/en active Active
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- 2010-04-14 BR BR112012026205A patent/BR112012026205A2/en not_active Application Discontinuation
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Publication number | Priority date | Publication date | Assignee | Title |
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US20140309453A1 (en) * | 2011-09-30 | 2014-10-16 | Meiji Seika Pharma Co., Ltd. | Method for producing glufosinate p free acid |
US9255115B2 (en) * | 2011-09-30 | 2016-02-09 | Meiji Seika Pharma Co. Ltd. | Method for producing glufosinate P free acid |
JP2017515842A (en) * | 2014-05-13 | 2017-06-15 | バイエル・クロップサイエンス・アクチェンゲゼルシャフト | Method for preparing phosphorus-containing cyanohydrins |
CN105567780A (en) * | 2016-01-14 | 2016-05-11 | 重庆惠健生物科技有限公司 | Enzyme-chemocatalysis racemization removing preparation method for L-glufosinate-ammonium |
CN113234767A (en) * | 2021-05-13 | 2021-08-10 | 永农生物科学有限公司 | Method for producing solid L-glufosinate ammonium salt powder free of crystal water |
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US10428092B2 (en) | 2019-10-01 |
CA2796158A1 (en) | 2011-10-20 |
WO2011129820A9 (en) | 2012-04-19 |
US8981142B2 (en) | 2015-03-17 |
BR112012026205A2 (en) | 2015-11-03 |
US20150239917A1 (en) | 2015-08-27 |
US20170247399A1 (en) | 2017-08-31 |
CA2796158C (en) | 2022-06-14 |
US9683001B2 (en) | 2017-06-20 |
US20130204031A1 (en) | 2013-08-08 |
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